大话GridView—(1) 编辑、删除、查看详情、分页

GridView控件的使用绝对是任何.net开发人员都必须具备的基础知识。如何使用，怎样用好GridView的各个功能，还是有很多人对其不甚了解，今天我将对GridView控件简单的编辑、删除进行阐述，希望对大家有所帮助。

创建表：

USE [test] 

GO

CREATE TABLE [dbo].[B]

( [ID] [int] NOT NULL,

[Subject] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL,

[Score] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL )ON [PRIMARY]

GO

前台代码如下：

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    </div>
    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
        DataKeyNames="ID" onrowcancelingedit="GridView1_RowCancelingEdit" 
        onrowdeleting="GridView1_RowDeleting" onrowediting="GridView1_RowEditing" 
        onrowupdating="GridView1_RowUpdating" AllowPaging="true" PageSize="5" 
        onpageindexchanging="GridView1_PageIndexChanging">
        <Columns>
            <asp:BoundField DataField="ID" HeaderText="编号" ReadOnly="True"/>
            <asp:TemplateField HeaderText="科目">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Subject") %>'></asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Bind("Subject") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="分数">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Score") %>'></asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label2" runat="server" Text='<%# Bind("Score") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:CommandField HeaderText="编辑" ShowEditButton="True" />
            <asp:CommandField HeaderText="删除" ShowDeleteButton="True" />
            <asp:HyperLinkField DataNavigateUrlFields="ID" 
                DataNavigateUrlFormatString="view.aspx?id={0}" HeaderText="查看" Text="查看" />
        </Columns>
    </asp:GridView>
    </form>
</body>
</html>

要使可以编辑，使想要编辑的字段转化为可编辑列。

后台代码：

代码

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
publicpartialclass _Default : System.Web.UI.Page
{
private SqlConnection conn;
private SqlCommand cmd;
private SqlDataAdapter adapter;
protectedvoid Page_Load(object sender, EventArgs e)
{
#region//绑定数据到GridView1
//!IsPostBack很重要，如果不加这句的话，将不能更新，因为该语句表示加载时再执行。具体用法，下次再详解
if (!IsPostBack)
{
bind();
}

#endregion

}
protected SqlConnection getDB()
{
#region//连接数据库
string connString ="server=MyComputer\\sqlexpress;database=test;uid=sa;pwd=123456";
returnnew SqlConnection(connString);
#endregion

}
protectedvoid bind()
{
#region//获取数据
string selet_all ="select * from B";
conn = getDB();
conn.Open();
cmd =new SqlCommand();
cmd.CommandText = selet_all;
cmd.Connection = conn;
adapter =new SqlDataAdapter(cmd);

DataSet ds =new DataSet();
adapter.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();
conn.Close();
#endregion

}
protectedvoid GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
#region//初始化编辑
GridView1.EditIndex = e.NewEditIndex;
bind();
#endregion
}
protectedvoid GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
#region//删除
int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value);
string delete_one ="delete from B where ID='"+id+"'";
conn = getDB();
conn.Open();
cmd =new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = delete_one;
cmd.ExecuteNonQuery();
conn.Close();
bind();
#endregion
}
protectedvoid GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
#region//取消编辑
GridView1.EditIndex =-1;
bind();
#endregion
}
protectedvoid GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
#region//更新
int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value);
TextBox sub = GridView1.Rows[e.RowIndex].Cells[1].FindControl("TextBox1") as TextBox;
TextBox sco = GridView1.Rows[e.RowIndex].Cells[2].FindControl("TextBox2") as TextBox;
string subject = sub.Text.Trim().ToString();
string score = sco.Text.Trim().ToString();
string update_one ="update B set Subject='"+subject+"',Score='"+score+"' where ID='"+id+"'";
conn = getDB();
conn.Open();
cmd =new SqlCommand();
cmd.CommandText = update_one;
cmd.Connection = conn;
cmd.ExecuteNonQuery();
conn.Close();
GridView1.EditIndex =-1;
bind();
#endregion
}
protectedvoid GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;//绑定新业
bind();
}
}

点击查看详情，转到view.aspx是通过以下代码获取ID的值：

代码

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

publicpartialclass view : System.Web.UI.Page
{
protectedvoid Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
int id=Convert.ToInt32(Request.QueryString["ID"].ToString());
Lable1.Text = id.ToString();
}
}
}

GridView功能也许没有DataList强大，但是它在很多地方还是有很大用处的，相信每个开发人员都已经了解到了，GridView还自带分页、设置样式等。这里的代码分页如果记录过多的话，将使服务器经受很大的考验，接下来我将为大家继续码优质的分页代码和其它GridView高级进阶。谢谢！！

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原文地址：https://www.cnblogs.com/xiaoyi115/p/1883451.html